Bird and bat casualties associated with wind power operations
Measurement answer
What this metric measures
Reports the number of bird and bat casualties associated with wind power operations, disaggregated by animal group.
Specification
Metric specification
- Result format
- Structured table
- Unit
- number of casualties — source-defined reporting unit
- Reporting basis
- Reporting period
- Aggregation
- Number of reported casualties associated with wind power operations, disaggregated between birds and bats.
- Pillar
- Environmental
- Topic
- Wildlife casualties from wind power operations
- Controlled domain
- Nature, biodiversity and land
- Entity type
- Metric
Reporting boundary
Bird and bat casualties associated with the reporting organization's wind power operations during the reporting period.
Verified source occurrences
Framework coverage
This is one canonical metric. The bindings below show every verified framework occurrence without creating duplicate metric pages. Edition, disclosure, role, and relationship remain source-specific.
- Adopting DisclosureSource evidence
TNFD sector guidance
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Final English sector guidance collection through August 2026 (17 documents)
- Requirement
- Not Specified
- Relationship
- Defines Disclosure
- Mapping outcome
- Direct Evidence
- Source locator
- TNFD Additional Sector Guidance, Electricity and Power Generation, p. 68, Section 3.2, Table 13, EP.C1.0. | Source evidence summary: report the number of bird and bat casualties associated with wind power operations as an indicator of land and freshwater use impacts. | p.68, Section 3.2, Table 13, EP.C1.0
- Adopting DisclosureEP.C1.0
TNFD sector guidance
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Version 1.0, June 2024
- Requirement
- Conditional
- Relationship
- Maps Source Identity
- Mapping outcome
- Published
- Source locator
- p.68, Section 3.2, Table 13, EP.C1.0
Value structure
Dimensions and units
- Unit
- number of casualties — source-defined reporting unit
- Reporting basis
- Reporting period
Unit meaning: Values use number of casualties under the disclosed TNFD sector-guidance method, reporting period and boundary.
Table fields and units
- animal group
- number of casualties
- wind power operation or site boundary
- reporting period
Published dimensions
- animal group: bird
- animal group: bat
- activity: wind power operations
- impact category: land and freshwater use
Calculation method
Formula information
- Status
- Specified
- Formula type
- Count
Formula
Total casualties = number of bird casualties associated with wind power operations + number of bat casualties associated with wind power operations.Apply the source-defined TNFD sector-guidance method within the stated reporting boundary. This is a standalone, directly reportable count outcome in the core-sector metric table. The canonical identity preserves the specified bird-and-bat population and wind-operation boundary without adding unsupported threatened-species criteria. No shortlisted metric has the same casualty-count construct, operational boundary, and unit.
Variables
| Symbol | Variable | Definition | Unit |
|---|---|---|---|
B | Bird casualties | Number of bird casualties associated with wind power operations during the reporting period. | number of casualties |
T | Bat casualties | Number of bat casualties associated with wind power operations during the reporting period. | number of casualties |
Verified sources
Evidence and status sources
Sustopedia checked each record-specific claim directly against primary publisher material. Labels distinguish current measurement authority from future compatibility and corroborative, legal, edition, or method status context. Corroborative evidence can support a stated limitation but cannot establish the core measurement by itself.
Measurement evidence
- Measurement evidenceChecked 30 August 2026
TNFD additional sector guidance collection
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Final English sector guidance collection through August 2026 (17 documents)
- Locator
- TNFD Additional Sector Guidance, Electricity and Power Generation, p. 68, Section 3.2, Table 13, EP.C1.0. | Source evidence summary: report the number of bird and bat casualties associated with wind power operations as an indicator of land and freshwater use impacts. | p.68, Section 3.2, Table 13, EP.C1.0
Supports: The official TNFD sector guidance supports the identity, boundary and method basis of “Bird and bat casualties associated with wind power operations”.
Open official source
Use with context
Interpretation boundaries
Method disclosures required
Source-edition basis: TNFD sector guidance, Final English sector guidance collection through August 2026 (17 documents).
- State the wind power operations and sites included in the reporting boundary.
- Disclose the period over which casualties were counted.
- Disclose the approach used to identify and attribute bird and bat casualties to wind power operations.
- Report birds and bats separately and state any exclusions or unavailable monitoring coverage.
Record-specific limitations
- The reported count depends on the organization's casualty detection, identification, and attribution approach.
- Counts may not be comparable across sites with different monitoring coverage, search effort, or reporting protocols.
- The extracted evidence specifies bird and bat casualties but does not itself provide a threatened-species eligibility rule despite the source metric label.
Interpret this metric with the stated reporting boundary, period convention, value shape, and unit. Results prepared with different boundaries or conventions may not be directly comparable.
Measurement evidence supports the core record-specific claims described above. Corroborative evidence can support limitations, while compatibility and status sources provide their separately labelled context. None of these cards by itself determines an organisation's legal applicability, filing readiness, assurance status, or compliance conclusion.